论文部分内容阅读
1故障实例1 1.1故障现象一辆06款上海通用汽车公司生产的君越2.4 L轿车,行驶1 000 km后,出现自动变速器换挡点高,并且在换挡过程中伴有明显的冲击现象;同时,发动机故障指示灯和TC (牵引控制)指示灯点亮,仪表挡位指示灯始终指示D位。1.2故障诊断与分析君越2.4 L轿车的车载网络系统采用2种通讯网络(图1):发动机控制模块(ECM)和自动变速器电控单元
1 Fault Example 1 1.1 Fault phenomenon A 06 models Shanghai General Motors produced the LaCrosse 2.4 L sedan, driving 1000 km, the automatic transmission shift point high, and the shift process accompanied by a significant impact phenomenon; at the same time , The engine fault indicator and the TC (traction control) indicator light, the instrument range indicator always indicates the D position. 1.2 Fault Diagnosis and Analysis LaCrosse 2.4L sedan car network system uses two kinds of communication networks (Figure 1): Engine Control Module (ECM) and automatic transmission electronic control unit